![](data:image/png;base64,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)
1220 mm cold
aisle width
2440 mm between
center lines of hot
and cold aisle
Perforated tiles
or gratings
back
back
T42 racks
T42 racks
T42 racks
Cold aisle
Hot aisle
Air
conditioner
back
front
front
front
Airflow
Figure 11. Example of cold aisle/hot aisle rack configuration
Chapter 1. Introduction 25